/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:10:44,036 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:10:44,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:10:44,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:10:44,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:10:44,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:10:44,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:10:44,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:10:44,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:10:44,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:10:44,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:10:44,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:10:44,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:10:44,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:10:44,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:10:44,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:10:44,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:10:44,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:10:44,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:10:44,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:10:44,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:10:44,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:10:44,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:10:44,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:10:44,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:10:44,193 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:10:44,194 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:10:44,195 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:10:44,196 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:10:44,197 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:10:44,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:10:44,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:10:44,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:10:44,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:10:44,201 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:10:44,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:10:44,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:10:44,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:10:44,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:10:44,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:10:44,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:10:44,206 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:10:44,233 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:10:44,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:10:44,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:10:44,236 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:10:44,236 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:10:44,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:10:44,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:10:44,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:10:44,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:10:44,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:10:44,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:10:44,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:10:44,238 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:10:44,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:10:44,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:10:44,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:10:44,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:10:44,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:10:44,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:10:44,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:10:44,240 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:10:44,240 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:10:44,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:10:44,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:10:44,241 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:10:44,241 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:10:44,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:10:44,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:10:44,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:10:44,732 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:10:44,733 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:10:44,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2020-12-22 13:10:44,816 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95c844e5d/1f74d972d644403da30298b2a3c8b759/FLAG511ad13e8 [2020-12-22 13:10:45,875 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:10:45,876 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2020-12-22 13:10:45,944 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95c844e5d/1f74d972d644403da30298b2a3c8b759/FLAG511ad13e8 [2020-12-22 13:10:46,289 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95c844e5d/1f74d972d644403da30298b2a3c8b759 [2020-12-22 13:10:46,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:10:46,296 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:10:46,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:10:46,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:10:46,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:10:46,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:10:46" (1/1) ... [2020-12-22 13:10:46,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60b36f15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:46, skipping insertion in model container [2020-12-22 13:10:46,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:10:46" (1/1) ... [2020-12-22 13:10:46,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:10:46,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:10:47,675 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2020-12-22 13:10:48,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:10:48,362 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:10:48,512 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2020-12-22 13:10:48,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:10:49,039 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:10:49,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:49 WrapperNode [2020-12-22 13:10:49,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:10:49,042 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:10:49,043 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:10:49,043 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:10:49,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:49" (1/1) ... [2020-12-22 13:10:49,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:49" (1/1) ... [2020-12-22 13:10:49,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:10:49,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:10:49,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:10:49,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:10:49,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:49" (1/1) ... [2020-12-22 13:10:49,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:49" (1/1) ... [2020-12-22 13:10:49,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:49" (1/1) ... [2020-12-22 13:10:49,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:49" (1/1) ... [2020-12-22 13:10:49,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:49" (1/1) ... [2020-12-22 13:10:49,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:49" (1/1) ... [2020-12-22 13:10:49,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:49" (1/1) ... [2020-12-22 13:10:49,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:10:49,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:10:49,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:10:49,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:10:49,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:10:49,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:10:49,833 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2020-12-22 13:10:49,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2020-12-22 13:10:49,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 13:10:49,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 13:10:49,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:10:49,834 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2020-12-22 13:10:49,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2020-12-22 13:10:49,834 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_read_bulk_callback [2020-12-22 13:10:49,834 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_read_bulk_callback [2020-12-22 13:10:49,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:10:49,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:10:49,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:10:49,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:10:49,835 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-12-22 13:10:49,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-12-22 13:10:49,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:10:49,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:10:49,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:10:49,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:10:49,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 13:10:49,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:10:49,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:11:00,714 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:11:00,714 INFO L299 CfgBuilder]: Removed 561 assume(true) statements. [2020-12-22 13:11:00,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:11:00 BoogieIcfgContainer [2020-12-22 13:11:00,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:11:00,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:11:00,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:11:00,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:11:00,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:10:46" (1/3) ... [2020-12-22 13:11:00,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3761c78f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:11:00, skipping insertion in model container [2020-12-22 13:11:00,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:49" (2/3) ... [2020-12-22 13:11:00,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3761c78f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:11:00, skipping insertion in model container [2020-12-22 13:11:00,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:11:00" (3/3) ... [2020-12-22 13:11:00,727 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2020-12-22 13:11:00,737 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:11:00,744 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 13:11:00,764 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 13:11:00,816 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:11:00,816 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:11:00,817 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:11:00,817 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:11:00,817 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:11:00,817 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:11:00,817 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:11:00,818 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:11:00,860 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states. [2020-12-22 13:11:00,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 13:11:00,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:00,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:00,869 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:00,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:00,877 INFO L82 PathProgramCache]: Analyzing trace with hash 812919680, now seen corresponding path program 1 times [2020-12-22 13:11:00,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:00,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675359121] [2020-12-22 13:11:00,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:11:01,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675359121] [2020-12-22 13:11:01,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:01,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:11:01,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820442869] [2020-12-22 13:11:01,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:01,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:01,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:01,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:01,484 INFO L87 Difference]: Start difference. First operand 590 states. Second operand 3 states. [2020-12-22 13:11:02,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:02,451 INFO L93 Difference]: Finished difference Result 1716 states and 2450 transitions. [2020-12-22 13:11:02,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:02,453 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-22 13:11:02,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:02,483 INFO L225 Difference]: With dead ends: 1716 [2020-12-22 13:11:02,483 INFO L226 Difference]: Without dead ends: 1113 [2020-12-22 13:11:02,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:02,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2020-12-22 13:11:02,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1113. [2020-12-22 13:11:02,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1113 states. [2020-12-22 13:11:02,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1546 transitions. [2020-12-22 13:11:02,634 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1546 transitions. Word has length 17 [2020-12-22 13:11:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:02,635 INFO L481 AbstractCegarLoop]: Abstraction has 1113 states and 1546 transitions. [2020-12-22 13:11:02,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:02,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1546 transitions. [2020-12-22 13:11:02,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 13:11:02,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:02,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:02,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:11:02,638 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:02,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:02,639 INFO L82 PathProgramCache]: Analyzing trace with hash 366683969, now seen corresponding path program 1 times [2020-12-22 13:11:02,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:02,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128340905] [2020-12-22 13:11:02,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:11:02,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128340905] [2020-12-22 13:11:02,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:02,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:11:02,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448636604] [2020-12-22 13:11:02,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:02,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:02,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:02,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:02,960 INFO L87 Difference]: Start difference. First operand 1113 states and 1546 transitions. Second operand 3 states. [2020-12-22 13:11:03,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:03,212 INFO L93 Difference]: Finished difference Result 3311 states and 4607 transitions. [2020-12-22 13:11:03,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:03,213 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-22 13:11:03,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:03,232 INFO L225 Difference]: With dead ends: 3311 [2020-12-22 13:11:03,232 INFO L226 Difference]: Without dead ends: 2211 [2020-12-22 13:11:03,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:03,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2020-12-22 13:11:03,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2199. [2020-12-22 13:11:03,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2199 states. [2020-12-22 13:11:03,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 3054 transitions. [2020-12-22 13:11:03,359 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 3054 transitions. Word has length 24 [2020-12-22 13:11:03,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:03,359 INFO L481 AbstractCegarLoop]: Abstraction has 2199 states and 3054 transitions. [2020-12-22 13:11:03,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:03,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 3054 transitions. [2020-12-22 13:11:03,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 13:11:03,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:03,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:03,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:11:03,367 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:03,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:03,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1517698873, now seen corresponding path program 1 times [2020-12-22 13:11:03,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:03,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516590004] [2020-12-22 13:11:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:11:03,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516590004] [2020-12-22 13:11:03,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:03,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:11:03,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756815609] [2020-12-22 13:11:03,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:03,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:03,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:03,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:03,614 INFO L87 Difference]: Start difference. First operand 2199 states and 3054 transitions. Second operand 3 states. [2020-12-22 13:11:03,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:03,712 INFO L93 Difference]: Finished difference Result 2199 states and 3054 transitions. [2020-12-22 13:11:03,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:03,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-22 13:11:03,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:03,728 INFO L225 Difference]: With dead ends: 2199 [2020-12-22 13:11:03,728 INFO L226 Difference]: Without dead ends: 2197 [2020-12-22 13:11:03,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:03,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2020-12-22 13:11:03,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 2197. [2020-12-22 13:11:03,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2197 states. [2020-12-22 13:11:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2197 states to 2197 states and 3052 transitions. [2020-12-22 13:11:03,868 INFO L78 Accepts]: Start accepts. Automaton has 2197 states and 3052 transitions. Word has length 25 [2020-12-22 13:11:03,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:03,868 INFO L481 AbstractCegarLoop]: Abstraction has 2197 states and 3052 transitions. [2020-12-22 13:11:03,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:03,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2197 states and 3052 transitions. [2020-12-22 13:11:03,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 13:11:03,869 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:03,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:03,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:11:03,870 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:03,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:03,871 INFO L82 PathProgramCache]: Analyzing trace with hash 195975179, now seen corresponding path program 1 times [2020-12-22 13:11:03,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:03,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818671052] [2020-12-22 13:11:03,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:04,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:11:04,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818671052] [2020-12-22 13:11:04,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:04,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:11:04,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066151137] [2020-12-22 13:11:04,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:04,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:04,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:04,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:04,105 INFO L87 Difference]: Start difference. First operand 2197 states and 3052 transitions. Second operand 3 states. [2020-12-22 13:11:04,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:04,201 INFO L93 Difference]: Finished difference Result 2197 states and 3052 transitions. [2020-12-22 13:11:04,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:04,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-22 13:11:04,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:04,215 INFO L225 Difference]: With dead ends: 2197 [2020-12-22 13:11:04,215 INFO L226 Difference]: Without dead ends: 2195 [2020-12-22 13:11:04,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:04,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2020-12-22 13:11:04,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 2195. [2020-12-22 13:11:04,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2195 states. [2020-12-22 13:11:04,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 3050 transitions. [2020-12-22 13:11:04,335 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 3050 transitions. Word has length 26 [2020-12-22 13:11:04,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:04,335 INFO L481 AbstractCegarLoop]: Abstraction has 2195 states and 3050 transitions. [2020-12-22 13:11:04,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:04,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 3050 transitions. [2020-12-22 13:11:04,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 13:11:04,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:04,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:04,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:11:04,337 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:04,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:04,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1780263249, now seen corresponding path program 1 times [2020-12-22 13:11:04,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:04,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124363978] [2020-12-22 13:11:04,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:11:04,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124363978] [2020-12-22 13:11:04,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:04,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:11:04,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643017842] [2020-12-22 13:11:04,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:04,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:04,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:04,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:04,509 INFO L87 Difference]: Start difference. First operand 2195 states and 3050 transitions. Second operand 3 states. [2020-12-22 13:11:04,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:04,608 INFO L93 Difference]: Finished difference Result 2195 states and 3050 transitions. [2020-12-22 13:11:04,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:04,609 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-22 13:11:04,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:04,622 INFO L225 Difference]: With dead ends: 2195 [2020-12-22 13:11:04,623 INFO L226 Difference]: Without dead ends: 2193 [2020-12-22 13:11:04,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:04,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2020-12-22 13:11:04,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 2193. [2020-12-22 13:11:04,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2193 states. [2020-12-22 13:11:04,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2193 states to 2193 states and 3048 transitions. [2020-12-22 13:11:04,748 INFO L78 Accepts]: Start accepts. Automaton has 2193 states and 3048 transitions. Word has length 27 [2020-12-22 13:11:04,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:04,749 INFO L481 AbstractCegarLoop]: Abstraction has 2193 states and 3048 transitions. [2020-12-22 13:11:04,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:04,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2193 states and 3048 transitions. [2020-12-22 13:11:04,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 13:11:04,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:04,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:04,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:11:04,751 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:04,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:04,751 INFO L82 PathProgramCache]: Analyzing trace with hash -646414123, now seen corresponding path program 1 times [2020-12-22 13:11:04,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:04,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146826708] [2020-12-22 13:11:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:11:04,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146826708] [2020-12-22 13:11:04,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:04,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:11:04,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524736628] [2020-12-22 13:11:04,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:04,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:04,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:04,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:04,897 INFO L87 Difference]: Start difference. First operand 2193 states and 3048 transitions. Second operand 3 states. [2020-12-22 13:11:04,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:04,996 INFO L93 Difference]: Finished difference Result 2193 states and 3048 transitions. [2020-12-22 13:11:04,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:04,998 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-12-22 13:11:05,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:05,015 INFO L225 Difference]: With dead ends: 2193 [2020-12-22 13:11:05,016 INFO L226 Difference]: Without dead ends: 2184 [2020-12-22 13:11:05,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:05,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2020-12-22 13:11:05,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2184. [2020-12-22 13:11:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2020-12-22 13:11:05,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3036 transitions. [2020-12-22 13:11:05,232 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3036 transitions. Word has length 28 [2020-12-22 13:11:05,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:05,232 INFO L481 AbstractCegarLoop]: Abstraction has 2184 states and 3036 transitions. [2020-12-22 13:11:05,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:05,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3036 transitions. [2020-12-22 13:11:05,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 13:11:05,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:05,238 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:05,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:11:05,238 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:05,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:05,239 INFO L82 PathProgramCache]: Analyzing trace with hash 593395099, now seen corresponding path program 1 times [2020-12-22 13:11:05,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:05,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898504544] [2020-12-22 13:11:05,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:05,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:11:05,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898504544] [2020-12-22 13:11:05,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:05,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:11:05,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454548821] [2020-12-22 13:11:05,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:05,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:05,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:05,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:05,379 INFO L87 Difference]: Start difference. First operand 2184 states and 3036 transitions. Second operand 3 states. [2020-12-22 13:11:05,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:05,595 INFO L93 Difference]: Finished difference Result 4886 states and 6761 transitions. [2020-12-22 13:11:05,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:05,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 13:11:05,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:05,611 INFO L225 Difference]: With dead ends: 4886 [2020-12-22 13:11:05,611 INFO L226 Difference]: Without dead ends: 2715 [2020-12-22 13:11:05,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:05,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2020-12-22 13:11:05,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 2710. [2020-12-22 13:11:05,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2710 states. [2020-12-22 13:11:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2710 states to 2710 states and 3732 transitions. [2020-12-22 13:11:05,774 INFO L78 Accepts]: Start accepts. Automaton has 2710 states and 3732 transitions. Word has length 52 [2020-12-22 13:11:05,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:05,774 INFO L481 AbstractCegarLoop]: Abstraction has 2710 states and 3732 transitions. [2020-12-22 13:11:05,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:05,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2710 states and 3732 transitions. [2020-12-22 13:11:05,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 13:11:05,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:05,779 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:05,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:11:05,779 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:05,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:05,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1400283468, now seen corresponding path program 1 times [2020-12-22 13:11:05,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:05,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85062947] [2020-12-22 13:11:05,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:11:05,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85062947] [2020-12-22 13:11:05,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:05,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:11:05,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854908925] [2020-12-22 13:11:05,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:05,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:05,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:05,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:05,957 INFO L87 Difference]: Start difference. First operand 2710 states and 3732 transitions. Second operand 3 states. [2020-12-22 13:11:07,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:07,518 INFO L93 Difference]: Finished difference Result 5986 states and 8241 transitions. [2020-12-22 13:11:07,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:07,519 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 13:11:07,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:07,536 INFO L225 Difference]: With dead ends: 5986 [2020-12-22 13:11:07,537 INFO L226 Difference]: Without dead ends: 3289 [2020-12-22 13:11:07,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3289 states. [2020-12-22 13:11:07,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3289 to 3284. [2020-12-22 13:11:07,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3284 states. [2020-12-22 13:11:07,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 4496 transitions. [2020-12-22 13:11:07,770 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 4496 transitions. Word has length 62 [2020-12-22 13:11:07,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:07,770 INFO L481 AbstractCegarLoop]: Abstraction has 3284 states and 4496 transitions. [2020-12-22 13:11:07,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:07,770 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 4496 transitions. [2020-12-22 13:11:07,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 13:11:07,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:07,774 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:07,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 13:11:07,775 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:07,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:07,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1202855944, now seen corresponding path program 1 times [2020-12-22 13:11:07,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:07,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045611712] [2020-12-22 13:11:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:11:07,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045611712] [2020-12-22 13:11:07,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:07,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:11:07,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747963916] [2020-12-22 13:11:07,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:07,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:07,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:07,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:07,913 INFO L87 Difference]: Start difference. First operand 3284 states and 4496 transitions. Second operand 3 states. [2020-12-22 13:11:08,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:08,860 INFO L93 Difference]: Finished difference Result 7698 states and 10569 transitions. [2020-12-22 13:11:08,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:08,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 13:11:08,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:08,888 INFO L225 Difference]: With dead ends: 7698 [2020-12-22 13:11:08,888 INFO L226 Difference]: Without dead ends: 4427 [2020-12-22 13:11:08,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:08,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4427 states. [2020-12-22 13:11:09,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4427 to 4422. [2020-12-22 13:11:09,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4422 states. [2020-12-22 13:11:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4422 states to 4422 states and 6060 transitions. [2020-12-22 13:11:09,207 INFO L78 Accepts]: Start accepts. Automaton has 4422 states and 6060 transitions. Word has length 74 [2020-12-22 13:11:09,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:09,208 INFO L481 AbstractCegarLoop]: Abstraction has 4422 states and 6060 transitions. [2020-12-22 13:11:09,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:09,208 INFO L276 IsEmpty]: Start isEmpty. Operand 4422 states and 6060 transitions. [2020-12-22 13:11:09,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 13:11:09,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:09,212 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:09,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 13:11:09,212 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:09,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:09,213 INFO L82 PathProgramCache]: Analyzing trace with hash 38724080, now seen corresponding path program 1 times [2020-12-22 13:11:09,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:09,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245545726] [2020-12-22 13:11:09,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:11:09,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245545726] [2020-12-22 13:11:09,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179568463] [2020-12-22 13:11:09,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:10,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 13:11:10,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:11:10,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:11:10,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2020-12-22 13:11:10,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016621426] [2020-12-22 13:11:10,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:11:10,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:10,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:11:10,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:11:10,369 INFO L87 Difference]: Start difference. First operand 4422 states and 6060 transitions. Second operand 4 states. [2020-12-22 13:11:12,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:12,112 INFO L93 Difference]: Finished difference Result 13241 states and 18150 transitions. [2020-12-22 13:11:12,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:11:12,113 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 13:11:12,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:12,197 INFO L225 Difference]: With dead ends: 13241 [2020-12-22 13:11:12,197 INFO L226 Difference]: Without dead ends: 13236 [2020-12-22 13:11:12,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:11:12,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13236 states. [2020-12-22 13:11:12,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13236 to 13046. [2020-12-22 13:11:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13046 states. [2020-12-22 13:11:13,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13046 states to 13046 states and 17922 transitions. [2020-12-22 13:11:13,047 INFO L78 Accepts]: Start accepts. Automaton has 13046 states and 17922 transitions. Word has length 76 [2020-12-22 13:11:13,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:13,048 INFO L481 AbstractCegarLoop]: Abstraction has 13046 states and 17922 transitions. [2020-12-22 13:11:13,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:11:13,049 INFO L276 IsEmpty]: Start isEmpty. Operand 13046 states and 17922 transitions. [2020-12-22 13:11:13,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 13:11:13,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:13,061 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:13,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 13:11:13,275 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:13,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:13,276 INFO L82 PathProgramCache]: Analyzing trace with hash -483700015, now seen corresponding path program 1 times [2020-12-22 13:11:13,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:13,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425861915] [2020-12-22 13:11:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:11:13,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425861915] [2020-12-22 13:11:13,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135401089] [2020-12-22 13:11:13,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:14,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 13:11:14,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 13:11:14,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:11:14,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2020-12-22 13:11:14,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113143902] [2020-12-22 13:11:14,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:14,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:14,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:14,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:11:14,271 INFO L87 Difference]: Start difference. First operand 13046 states and 17922 transitions. Second operand 3 states. [2020-12-22 13:11:16,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:16,690 INFO L93 Difference]: Finished difference Result 19833 states and 27266 transitions. [2020-12-22 13:11:16,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:16,691 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 13:11:16,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:16,713 INFO L225 Difference]: With dead ends: 19833 [2020-12-22 13:11:16,714 INFO L226 Difference]: Without dead ends: 6433 [2020-12-22 13:11:16,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:11:16,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6433 states. [2020-12-22 13:11:17,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6433 to 6433. [2020-12-22 13:11:17,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6433 states. [2020-12-22 13:11:17,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6433 states to 6433 states and 8823 transitions. [2020-12-22 13:11:17,075 INFO L78 Accepts]: Start accepts. Automaton has 6433 states and 8823 transitions. Word has length 83 [2020-12-22 13:11:17,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:17,075 INFO L481 AbstractCegarLoop]: Abstraction has 6433 states and 8823 transitions. [2020-12-22 13:11:17,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:17,075 INFO L276 IsEmpty]: Start isEmpty. Operand 6433 states and 8823 transitions. [2020-12-22 13:11:17,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 13:11:17,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:17,083 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:17,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:17,298 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:17,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:17,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1092841713, now seen corresponding path program 1 times [2020-12-22 13:11:17,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:17,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798523225] [2020-12-22 13:11:17,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 13:11:17,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798523225] [2020-12-22 13:11:17,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:17,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:11:17,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158180244] [2020-12-22 13:11:17,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:17,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:17,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:17,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:17,441 INFO L87 Difference]: Start difference. First operand 6433 states and 8823 transitions. Second operand 3 states. [2020-12-22 13:11:18,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:18,058 INFO L93 Difference]: Finished difference Result 16645 states and 23003 transitions. [2020-12-22 13:11:18,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:18,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-12-22 13:11:18,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:18,097 INFO L225 Difference]: With dead ends: 16645 [2020-12-22 13:11:18,097 INFO L226 Difference]: Without dead ends: 10210 [2020-12-22 13:11:18,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:18,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10210 states. [2020-12-22 13:11:18,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10210 to 10159. [2020-12-22 13:11:18,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10159 states. [2020-12-22 13:11:18,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10159 states to 10159 states and 14081 transitions. [2020-12-22 13:11:18,764 INFO L78 Accepts]: Start accepts. Automaton has 10159 states and 14081 transitions. Word has length 86 [2020-12-22 13:11:18,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:18,764 INFO L481 AbstractCegarLoop]: Abstraction has 10159 states and 14081 transitions. [2020-12-22 13:11:18,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:18,765 INFO L276 IsEmpty]: Start isEmpty. Operand 10159 states and 14081 transitions. [2020-12-22 13:11:18,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 13:11:18,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:18,779 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:18,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 13:11:18,780 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:18,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:18,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1975174479, now seen corresponding path program 2 times [2020-12-22 13:11:18,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:18,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504125892] [2020-12-22 13:11:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 13:11:18,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504125892] [2020-12-22 13:11:18,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:18,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:11:18,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487710905] [2020-12-22 13:11:18,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:18,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:18,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:18,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:18,902 INFO L87 Difference]: Start difference. First operand 10159 states and 14081 transitions. Second operand 3 states. [2020-12-22 13:11:20,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:20,974 INFO L93 Difference]: Finished difference Result 21653 states and 30099 transitions. [2020-12-22 13:11:20,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:20,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-12-22 13:11:20,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:21,014 INFO L225 Difference]: With dead ends: 21653 [2020-12-22 13:11:21,015 INFO L226 Difference]: Without dead ends: 11507 [2020-12-22 13:11:21,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:21,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11507 states. [2020-12-22 13:11:21,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11507 to 11227. [2020-12-22 13:11:21,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11227 states. [2020-12-22 13:11:21,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11227 states to 11227 states and 15601 transitions. [2020-12-22 13:11:21,605 INFO L78 Accepts]: Start accepts. Automaton has 11227 states and 15601 transitions. Word has length 86 [2020-12-22 13:11:21,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:21,606 INFO L481 AbstractCegarLoop]: Abstraction has 11227 states and 15601 transitions. [2020-12-22 13:11:21,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:21,606 INFO L276 IsEmpty]: Start isEmpty. Operand 11227 states and 15601 transitions. [2020-12-22 13:11:21,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 13:11:21,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:21,612 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:21,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 13:11:21,613 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:21,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:21,613 INFO L82 PathProgramCache]: Analyzing trace with hash -401392373, now seen corresponding path program 1 times [2020-12-22 13:11:21,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:21,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070302072] [2020-12-22 13:11:21,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 13:11:21,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070302072] [2020-12-22 13:11:21,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085201323] [2020-12-22 13:11:21,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:22,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 13:11:22,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:22,598 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 13:11:22,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:11:22,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 13:11:22,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680834743] [2020-12-22 13:11:22,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:22,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:22,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:22,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:11:22,600 INFO L87 Difference]: Start difference. First operand 11227 states and 15601 transitions. Second operand 3 states. [2020-12-22 13:11:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:24,011 INFO L93 Difference]: Finished difference Result 21845 states and 30398 transitions. [2020-12-22 13:11:24,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:24,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2020-12-22 13:11:24,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:24,050 INFO L225 Difference]: With dead ends: 21845 [2020-12-22 13:11:24,050 INFO L226 Difference]: Without dead ends: 10808 [2020-12-22 13:11:24,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:11:24,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10808 states. [2020-12-22 13:11:24,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10808 to 10803. [2020-12-22 13:11:24,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10803 states. [2020-12-22 13:11:24,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10803 states to 10803 states and 14992 transitions. [2020-12-22 13:11:24,675 INFO L78 Accepts]: Start accepts. Automaton has 10803 states and 14992 transitions. Word has length 88 [2020-12-22 13:11:24,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:24,676 INFO L481 AbstractCegarLoop]: Abstraction has 10803 states and 14992 transitions. [2020-12-22 13:11:24,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:24,676 INFO L276 IsEmpty]: Start isEmpty. Operand 10803 states and 14992 transitions. [2020-12-22 13:11:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 13:11:24,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:24,682 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:24,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 13:11:24,897 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:24,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:24,898 INFO L82 PathProgramCache]: Analyzing trace with hash 2088136589, now seen corresponding path program 1 times [2020-12-22 13:11:24,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:24,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856384589] [2020-12-22 13:11:24,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 13:11:25,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856384589] [2020-12-22 13:11:25,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:25,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:11:25,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256831382] [2020-12-22 13:11:25,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:11:25,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:25,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:11:25,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:11:25,020 INFO L87 Difference]: Start difference. First operand 10803 states and 14992 transitions. Second operand 4 states. [2020-12-22 13:11:25,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:25,933 INFO L93 Difference]: Finished difference Result 32188 states and 44536 transitions. [2020-12-22 13:11:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:11:25,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2020-12-22 13:11:25,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:26,016 INFO L225 Difference]: With dead ends: 32188 [2020-12-22 13:11:26,017 INFO L226 Difference]: Without dead ends: 21575 [2020-12-22 13:11:26,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:11:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21575 states. [2020-12-22 13:11:26,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21575 to 10831. [2020-12-22 13:11:26,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10831 states. [2020-12-22 13:11:26,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10831 states to 10831 states and 15020 transitions. [2020-12-22 13:11:26,874 INFO L78 Accepts]: Start accepts. Automaton has 10831 states and 15020 transitions. Word has length 88 [2020-12-22 13:11:26,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:26,874 INFO L481 AbstractCegarLoop]: Abstraction has 10831 states and 15020 transitions. [2020-12-22 13:11:26,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:11:26,874 INFO L276 IsEmpty]: Start isEmpty. Operand 10831 states and 15020 transitions. [2020-12-22 13:11:26,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 13:11:26,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:26,883 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:26,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 13:11:26,884 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:26,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:26,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1530586731, now seen corresponding path program 1 times [2020-12-22 13:11:26,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:26,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331803065] [2020-12-22 13:11:26,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 13:11:27,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331803065] [2020-12-22 13:11:27,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:27,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:11:27,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272243364] [2020-12-22 13:11:27,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:11:27,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:27,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:11:27,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:11:27,095 INFO L87 Difference]: Start difference. First operand 10831 states and 15020 transitions. Second operand 4 states. [2020-12-22 13:11:29,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:29,117 INFO L93 Difference]: Finished difference Result 40545 states and 55948 transitions. [2020-12-22 13:11:29,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:11:29,118 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-12-22 13:11:29,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:29,202 INFO L225 Difference]: With dead ends: 40545 [2020-12-22 13:11:29,203 INFO L226 Difference]: Without dead ends: 29904 [2020-12-22 13:11:29,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:11:29,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29904 states. [2020-12-22 13:11:30,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29904 to 10943. [2020-12-22 13:11:30,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10943 states. [2020-12-22 13:11:30,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10943 states to 10943 states and 15160 transitions. [2020-12-22 13:11:30,116 INFO L78 Accepts]: Start accepts. Automaton has 10943 states and 15160 transitions. Word has length 89 [2020-12-22 13:11:30,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:30,117 INFO L481 AbstractCegarLoop]: Abstraction has 10943 states and 15160 transitions. [2020-12-22 13:11:30,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:11:30,117 INFO L276 IsEmpty]: Start isEmpty. Operand 10943 states and 15160 transitions. [2020-12-22 13:11:30,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 13:11:30,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:30,124 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:30,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 13:11:30,125 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:30,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:30,125 INFO L82 PathProgramCache]: Analyzing trace with hash 859087929, now seen corresponding path program 1 times [2020-12-22 13:11:30,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:30,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649445972] [2020-12-22 13:11:30,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 13:11:30,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649445972] [2020-12-22 13:11:30,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:30,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 13:11:30,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222498204] [2020-12-22 13:11:30,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 13:11:30,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:30,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 13:11:30,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:11:30,555 INFO L87 Difference]: Start difference. First operand 10943 states and 15160 transitions. Second operand 9 states. [2020-12-22 13:11:40,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:40,646 INFO L93 Difference]: Finished difference Result 72345 states and 99583 transitions. [2020-12-22 13:11:40,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-22 13:11:40,648 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 13:11:40,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:40,782 INFO L225 Difference]: With dead ends: 72345 [2020-12-22 13:11:40,782 INFO L226 Difference]: Without dead ends: 61592 [2020-12-22 13:11:40,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=896, Invalid=3796, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 13:11:40,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61592 states. [2020-12-22 13:11:42,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61592 to 10943. [2020-12-22 13:11:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10943 states. [2020-12-22 13:11:42,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10943 states to 10943 states and 15153 transitions. [2020-12-22 13:11:42,692 INFO L78 Accepts]: Start accepts. Automaton has 10943 states and 15153 transitions. Word has length 91 [2020-12-22 13:11:42,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:42,693 INFO L481 AbstractCegarLoop]: Abstraction has 10943 states and 15153 transitions. [2020-12-22 13:11:42,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 13:11:42,693 INFO L276 IsEmpty]: Start isEmpty. Operand 10943 states and 15153 transitions. [2020-12-22 13:11:42,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 13:11:42,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:42,702 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:42,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 13:11:42,703 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:42,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:42,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1126116685, now seen corresponding path program 1 times [2020-12-22 13:11:42,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:42,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807882] [2020-12-22 13:11:42,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:42,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 13:11:43,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807882] [2020-12-22 13:11:43,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:43,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 13:11:43,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812909580] [2020-12-22 13:11:43,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 13:11:43,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:43,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 13:11:43,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-22 13:11:43,431 INFO L87 Difference]: Start difference. First operand 10943 states and 15153 transitions. Second operand 11 states. [2020-12-22 13:11:48,484 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 13:11:48,787 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 13:11:49,579 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 13:11:49,789 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 13:11:51,408 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 13:11:52,676 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 13:12:01,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:01,890 INFO L93 Difference]: Finished difference Result 74524 states and 102528 transitions. [2020-12-22 13:12:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-22 13:12:01,891 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 97 [2020-12-22 13:12:01,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:02,046 INFO L225 Difference]: With dead ends: 74524 [2020-12-22 13:12:02,046 INFO L226 Difference]: Without dead ends: 63579 [2020-12-22 13:12:02,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2807 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1485, Invalid=5997, Unknown=0, NotChecked=0, Total=7482 [2020-12-22 13:12:02,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63579 states. [2020-12-22 13:12:04,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63579 to 13928. [2020-12-22 13:12:04,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13928 states. [2020-12-22 13:12:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13928 states to 13928 states and 19230 transitions. [2020-12-22 13:12:04,597 INFO L78 Accepts]: Start accepts. Automaton has 13928 states and 19230 transitions. Word has length 97 [2020-12-22 13:12:04,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:04,598 INFO L481 AbstractCegarLoop]: Abstraction has 13928 states and 19230 transitions. [2020-12-22 13:12:04,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 13:12:04,598 INFO L276 IsEmpty]: Start isEmpty. Operand 13928 states and 19230 transitions. [2020-12-22 13:12:04,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 13:12:04,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:04,609 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:04,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 13:12:04,610 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:04,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:04,610 INFO L82 PathProgramCache]: Analyzing trace with hash -881987495, now seen corresponding path program 1 times [2020-12-22 13:12:04,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:04,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217006138] [2020-12-22 13:12:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-22 13:12:04,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217006138] [2020-12-22 13:12:04,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:12:04,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:12:04,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590033191] [2020-12-22 13:12:04,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:12:04,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:04,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:12:04,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:12:04,725 INFO L87 Difference]: Start difference. First operand 13928 states and 19230 transitions. Second operand 4 states. [2020-12-22 13:12:09,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:09,099 INFO L93 Difference]: Finished difference Result 35121 states and 48345 transitions. [2020-12-22 13:12:09,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:12:09,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 13:12:09,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:09,150 INFO L225 Difference]: With dead ends: 35121 [2020-12-22 13:12:09,151 INFO L226 Difference]: Without dead ends: 21206 [2020-12-22 13:12:09,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:12:09,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21206 states. [2020-12-22 13:12:10,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21206 to 13980. [2020-12-22 13:12:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13980 states. [2020-12-22 13:12:11,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13980 states to 13980 states and 19282 transitions. [2020-12-22 13:12:11,022 INFO L78 Accepts]: Start accepts. Automaton has 13980 states and 19282 transitions. Word has length 115 [2020-12-22 13:12:11,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:11,023 INFO L481 AbstractCegarLoop]: Abstraction has 13980 states and 19282 transitions. [2020-12-22 13:12:11,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:12:11,023 INFO L276 IsEmpty]: Start isEmpty. Operand 13980 states and 19282 transitions. [2020-12-22 13:12:11,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 13:12:11,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:11,035 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:11,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 13:12:11,035 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:11,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:11,036 INFO L82 PathProgramCache]: Analyzing trace with hash 809322604, now seen corresponding path program 1 times [2020-12-22 13:12:11,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:11,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519361829] [2020-12-22 13:12:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-22 13:12:11,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519361829] [2020-12-22 13:12:11,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:12:11,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:12:11,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046014268] [2020-12-22 13:12:11,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:12:11,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:11,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:12:11,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:12:11,269 INFO L87 Difference]: Start difference. First operand 13980 states and 19282 transitions. Second operand 4 states. [2020-12-22 13:12:15,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:15,040 INFO L93 Difference]: Finished difference Result 35251 states and 48475 transitions. [2020-12-22 13:12:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:12:15,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2020-12-22 13:12:15,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:15,082 INFO L225 Difference]: With dead ends: 35251 [2020-12-22 13:12:15,082 INFO L226 Difference]: Without dead ends: 21284 [2020-12-22 13:12:15,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:12:15,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21284 states. [2020-12-22 13:12:17,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21284 to 13980. [2020-12-22 13:12:17,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13980 states. [2020-12-22 13:12:17,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13980 states to 13980 states and 19282 transitions. [2020-12-22 13:12:17,053 INFO L78 Accepts]: Start accepts. Automaton has 13980 states and 19282 transitions. Word has length 119 [2020-12-22 13:12:17,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:17,054 INFO L481 AbstractCegarLoop]: Abstraction has 13980 states and 19282 transitions. [2020-12-22 13:12:17,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:12:17,054 INFO L276 IsEmpty]: Start isEmpty. Operand 13980 states and 19282 transitions. [2020-12-22 13:12:17,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 13:12:17,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:17,066 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:17,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 13:12:17,066 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:17,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:17,067 INFO L82 PathProgramCache]: Analyzing trace with hash -2068841235, now seen corresponding path program 1 times [2020-12-22 13:12:17,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:17,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093065332] [2020-12-22 13:12:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-22 13:12:17,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093065332] [2020-12-22 13:12:17,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:12:17,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:12:17,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295145034] [2020-12-22 13:12:17,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:12:17,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:17,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:12:17,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:12:17,231 INFO L87 Difference]: Start difference. First operand 13980 states and 19282 transitions. Second operand 3 states. [2020-12-22 13:12:19,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:19,115 INFO L93 Difference]: Finished difference Result 27999 states and 38627 transitions. [2020-12-22 13:12:19,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:12:19,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2020-12-22 13:12:19,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:19,138 INFO L225 Difference]: With dead ends: 27999 [2020-12-22 13:12:19,138 INFO L226 Difference]: Without dead ends: 14032 [2020-12-22 13:12:19,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:12:19,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14032 states. [2020-12-22 13:12:20,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14032 to 14006. [2020-12-22 13:12:20,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14006 states. [2020-12-22 13:12:20,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14006 states to 14006 states and 19308 transitions. [2020-12-22 13:12:20,885 INFO L78 Accepts]: Start accepts. Automaton has 14006 states and 19308 transitions. Word has length 140 [2020-12-22 13:12:20,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:20,885 INFO L481 AbstractCegarLoop]: Abstraction has 14006 states and 19308 transitions. [2020-12-22 13:12:20,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:12:20,885 INFO L276 IsEmpty]: Start isEmpty. Operand 14006 states and 19308 transitions. [2020-12-22 13:12:20,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 13:12:20,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:20,898 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:20,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 13:12:20,899 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:20,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:20,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1325074740, now seen corresponding path program 1 times [2020-12-22 13:12:20,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:20,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511052979] [2020-12-22 13:12:20,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-12-22 13:12:21,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511052979] [2020-12-22 13:12:21,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:12:21,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:12:21,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977654509] [2020-12-22 13:12:21,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:12:21,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:21,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:12:21,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:12:21,052 INFO L87 Difference]: Start difference. First operand 14006 states and 19308 transitions. Second operand 4 states. [2020-12-22 13:12:24,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:24,138 INFO L93 Difference]: Finished difference Result 35941 states and 49479 transitions. [2020-12-22 13:12:24,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:12:24,140 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2020-12-22 13:12:24,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:24,175 INFO L225 Difference]: With dead ends: 35941 [2020-12-22 13:12:24,175 INFO L226 Difference]: Without dead ends: 22128 [2020-12-22 13:12:24,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:12:24,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22128 states. [2020-12-22 13:12:26,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22128 to 14048. [2020-12-22 13:12:26,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14048 states. [2020-12-22 13:12:26,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14048 states to 14048 states and 19350 transitions. [2020-12-22 13:12:26,070 INFO L78 Accepts]: Start accepts. Automaton has 14048 states and 19350 transitions. Word has length 140 [2020-12-22 13:12:26,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:26,070 INFO L481 AbstractCegarLoop]: Abstraction has 14048 states and 19350 transitions. [2020-12-22 13:12:26,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:12:26,071 INFO L276 IsEmpty]: Start isEmpty. Operand 14048 states and 19350 transitions. [2020-12-22 13:12:26,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 13:12:26,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:26,081 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:26,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 13:12:26,081 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:26,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:26,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1835795162, now seen corresponding path program 1 times [2020-12-22 13:12:26,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:26,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719976630] [2020-12-22 13:12:26,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 13:12:26,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719976630] [2020-12-22 13:12:26,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:12:26,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:12:26,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672501081] [2020-12-22 13:12:26,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:12:26,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:26,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:12:26,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:12:26,241 INFO L87 Difference]: Start difference. First operand 14048 states and 19350 transitions. Second operand 3 states. [2020-12-22 13:12:28,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:28,232 INFO L93 Difference]: Finished difference Result 28163 states and 38805 transitions. [2020-12-22 13:12:28,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:12:28,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2020-12-22 13:12:28,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:28,257 INFO L225 Difference]: With dead ends: 28163 [2020-12-22 13:12:28,258 INFO L226 Difference]: Without dead ends: 14128 [2020-12-22 13:12:28,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:12:28,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14128 states. [2020-12-22 13:12:30,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14128 to 14088. [2020-12-22 13:12:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14088 states. [2020-12-22 13:12:30,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14088 states to 14088 states and 19390 transitions. [2020-12-22 13:12:30,124 INFO L78 Accepts]: Start accepts. Automaton has 14088 states and 19390 transitions. Word has length 142 [2020-12-22 13:12:30,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:30,124 INFO L481 AbstractCegarLoop]: Abstraction has 14088 states and 19390 transitions. [2020-12-22 13:12:30,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:12:30,124 INFO L276 IsEmpty]: Start isEmpty. Operand 14088 states and 19390 transitions. [2020-12-22 13:12:30,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 13:12:30,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:30,135 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:30,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 13:12:30,135 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:30,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:30,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1798951761, now seen corresponding path program 1 times [2020-12-22 13:12:30,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:30,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302708077] [2020-12-22 13:12:30,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-22 13:12:30,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302708077] [2020-12-22 13:12:30,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99112087] [2020-12-22 13:12:30,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:12:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:31,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 1944 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 13:12:31,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:12:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-22 13:12:31,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:12:31,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 13:12:31,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720113590] [2020-12-22 13:12:31,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:12:31,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:31,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:12:31,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:12:31,209 INFO L87 Difference]: Start difference. First operand 14088 states and 19390 transitions. Second operand 5 states. [2020-12-22 13:12:33,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:33,244 INFO L93 Difference]: Finished difference Result 28241 states and 38869 transitions. [2020-12-22 13:12:33,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:12:33,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 144 [2020-12-22 13:12:33,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:33,267 INFO L225 Difference]: With dead ends: 28241 [2020-12-22 13:12:33,267 INFO L226 Difference]: Without dead ends: 14166 [2020-12-22 13:12:33,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:12:33,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14166 states. [2020-12-22 13:12:34,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14166 to 14140. [2020-12-22 13:12:34,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14140 states. [2020-12-22 13:12:34,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14140 states to 14140 states and 19442 transitions. [2020-12-22 13:12:34,982 INFO L78 Accepts]: Start accepts. Automaton has 14140 states and 19442 transitions. Word has length 144 [2020-12-22 13:12:34,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:34,982 INFO L481 AbstractCegarLoop]: Abstraction has 14140 states and 19442 transitions. [2020-12-22 13:12:34,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:12:34,982 INFO L276 IsEmpty]: Start isEmpty. Operand 14140 states and 19442 transitions. [2020-12-22 13:12:34,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 13:12:34,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:34,994 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:35,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:12:35,205 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:35,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:35,206 INFO L82 PathProgramCache]: Analyzing trace with hash -894810166, now seen corresponding path program 1 times [2020-12-22 13:12:35,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:35,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915859984] [2020-12-22 13:12:35,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 13:12:35,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915859984] [2020-12-22 13:12:35,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553389368] [2020-12-22 13:12:35,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:12:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:36,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 1862 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 13:12:36,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:12:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 13:12:36,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:12:36,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 13:12:36,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877695149] [2020-12-22 13:12:36,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:12:36,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:36,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:12:36,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:12:36,372 INFO L87 Difference]: Start difference. First operand 14140 states and 19442 transitions. Second operand 5 states. [2020-12-22 13:12:38,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:38,224 INFO L93 Difference]: Finished difference Result 28387 states and 39029 transitions. [2020-12-22 13:12:38,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:12:38,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 144 [2020-12-22 13:12:38,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:38,258 INFO L225 Difference]: With dead ends: 28387 [2020-12-22 13:12:38,258 INFO L226 Difference]: Without dead ends: 14260 [2020-12-22 13:12:38,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:12:38,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14260 states. [2020-12-22 13:12:40,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14260 to 14220. [2020-12-22 13:12:40,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14220 states. [2020-12-22 13:12:40,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14220 states to 14220 states and 19522 transitions. [2020-12-22 13:12:40,139 INFO L78 Accepts]: Start accepts. Automaton has 14220 states and 19522 transitions. Word has length 144 [2020-12-22 13:12:40,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:40,140 INFO L481 AbstractCegarLoop]: Abstraction has 14220 states and 19522 transitions. [2020-12-22 13:12:40,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:12:40,140 INFO L276 IsEmpty]: Start isEmpty. Operand 14220 states and 19522 transitions. [2020-12-22 13:12:40,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 13:12:40,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:40,150 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:40,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 13:12:40,365 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:40,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:40,366 INFO L82 PathProgramCache]: Analyzing trace with hash 2013310283, now seen corresponding path program 2 times [2020-12-22 13:12:40,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:40,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046197053] [2020-12-22 13:12:40,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-22 13:12:40,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046197053] [2020-12-22 13:12:40,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921678730] [2020-12-22 13:12:40,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:12:43,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:12:43,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:12:43,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1950 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:12:44,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:12:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-22 13:12:44,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:12:44,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 13:12:44,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703970439] [2020-12-22 13:12:44,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 13:12:44,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:44,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 13:12:44,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:12:44,171 INFO L87 Difference]: Start difference. First operand 14220 states and 19522 transitions. Second operand 7 states. [2020-12-22 13:12:49,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:49,994 INFO L93 Difference]: Finished difference Result 50342 states and 69312 transitions. [2020-12-22 13:12:49,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 13:12:49,995 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 146 [2020-12-22 13:12:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:50,053 INFO L225 Difference]: With dead ends: 50342 [2020-12-22 13:12:50,054 INFO L226 Difference]: Without dead ends: 36135 [2020-12-22 13:12:50,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-12-22 13:12:50,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36135 states. [2020-12-22 13:12:53,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36135 to 22682. [2020-12-22 13:12:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22682 states. [2020-12-22 13:12:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22682 states to 22682 states and 31118 transitions. [2020-12-22 13:12:53,248 INFO L78 Accepts]: Start accepts. Automaton has 22682 states and 31118 transitions. Word has length 146 [2020-12-22 13:12:53,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:53,248 INFO L481 AbstractCegarLoop]: Abstraction has 22682 states and 31118 transitions. [2020-12-22 13:12:53,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 13:12:53,248 INFO L276 IsEmpty]: Start isEmpty. Operand 22682 states and 31118 transitions. [2020-12-22 13:12:53,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 13:12:53,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:53,257 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:53,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:12:53,461 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:53,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:53,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1448638830, now seen corresponding path program 2 times [2020-12-22 13:12:53,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:53,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405251388] [2020-12-22 13:12:53,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 50 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 13:12:53,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405251388] [2020-12-22 13:12:53,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524521750] [2020-12-22 13:12:53,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:12:57,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:12:57,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:12:57,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 1868 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:12:57,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:12:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 50 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 13:12:57,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:12:57,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 13:12:57,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089502040] [2020-12-22 13:12:57,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:12:57,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:57,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:12:57,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:12:57,625 INFO L87 Difference]: Start difference. First operand 22682 states and 31118 transitions. Second operand 6 states. [2020-12-22 13:13:01,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:13:01,429 INFO L93 Difference]: Finished difference Result 45507 states and 62429 transitions. [2020-12-22 13:13:01,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:13:01,430 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2020-12-22 13:13:01,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:13:01,481 INFO L225 Difference]: With dead ends: 45507 [2020-12-22 13:13:01,481 INFO L226 Difference]: Without dead ends: 22838 [2020-12-22 13:13:01,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:13:01,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22838 states. [2020-12-22 13:13:04,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22838 to 22786. [2020-12-22 13:13:04,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22786 states. [2020-12-22 13:13:04,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22786 states to 22786 states and 31222 transitions. [2020-12-22 13:13:04,575 INFO L78 Accepts]: Start accepts. Automaton has 22786 states and 31222 transitions. Word has length 146 [2020-12-22 13:13:04,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:13:04,576 INFO L481 AbstractCegarLoop]: Abstraction has 22786 states and 31222 transitions. [2020-12-22 13:13:04,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:13:04,576 INFO L276 IsEmpty]: Start isEmpty. Operand 22786 states and 31222 transitions. [2020-12-22 13:13:04,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 13:13:04,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:13:04,585 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:13:04,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 13:13:04,793 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:13:04,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:13:04,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1354706414, now seen corresponding path program 3 times [2020-12-22 13:13:04,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:13:04,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474611165] [2020-12-22 13:13:04,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:13:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:13:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 13:13:05,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474611165] [2020-12-22 13:13:05,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371570609] [2020-12-22 13:13:05,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:13:11,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 13:13:11,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:13:11,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 1367 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 13:13:11,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:13:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 13:13:11,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:13:11,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-12-22 13:13:11,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051969992] [2020-12-22 13:13:11,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:13:11,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:13:11,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:13:11,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:13:11,565 INFO L87 Difference]: Start difference. First operand 22786 states and 31222 transitions. Second operand 3 states. [2020-12-22 13:13:20,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:13:20,939 INFO L93 Difference]: Finished difference Result 54483 states and 74168 transitions. [2020-12-22 13:13:20,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:13:20,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2020-12-22 13:13:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:13:20,998 INFO L225 Difference]: With dead ends: 54483 [2020-12-22 13:13:20,998 INFO L226 Difference]: Without dead ends: 31710 [2020-12-22 13:13:21,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:13:21,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31710 states. [2020-12-22 13:13:24,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31710 to 22453. [2020-12-22 13:13:24,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22453 states. [2020-12-22 13:13:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22453 states to 22453 states and 30556 transitions. [2020-12-22 13:13:24,306 INFO L78 Accepts]: Start accepts. Automaton has 22453 states and 30556 transitions. Word has length 148 [2020-12-22 13:13:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:13:24,306 INFO L481 AbstractCegarLoop]: Abstraction has 22453 states and 30556 transitions. [2020-12-22 13:13:24,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:13:24,306 INFO L276 IsEmpty]: Start isEmpty. Operand 22453 states and 30556 transitions. [2020-12-22 13:13:24,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 13:13:24,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:13:24,323 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:13:24,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 13:13:24,525 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:13:24,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:13:24,526 INFO L82 PathProgramCache]: Analyzing trace with hash 2147309074, now seen corresponding path program 1 times [2020-12-22 13:13:24,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:13:24,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928533073] [2020-12-22 13:13:24,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:13:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:13:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 13:13:24,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928533073] [2020-12-22 13:13:24,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277699928] [2020-12-22 13:13:24,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:13:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:13:25,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 1874 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 13:13:25,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:13:25,941 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 13:13:25,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:13:25,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 13:13:25,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686106155] [2020-12-22 13:13:25,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 13:13:25,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:13:25,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 13:13:25,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:13:25,943 INFO L87 Difference]: Start difference. First operand 22453 states and 30556 transitions. Second operand 7 states. [2020-12-22 13:13:29,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:13:29,440 INFO L93 Difference]: Finished difference Result 45049 states and 61305 transitions. [2020-12-22 13:13:29,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:13:29,441 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 148 [2020-12-22 13:13:29,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:13:29,478 INFO L225 Difference]: With dead ends: 45049 [2020-12-22 13:13:29,478 INFO L226 Difference]: Without dead ends: 22609 [2020-12-22 13:13:29,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:13:29,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22609 states. [2020-12-22 13:13:32,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22609 to 22557. [2020-12-22 13:13:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22557 states. [2020-12-22 13:13:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22557 states to 22557 states and 30660 transitions. [2020-12-22 13:13:32,883 INFO L78 Accepts]: Start accepts. Automaton has 22557 states and 30660 transitions. Word has length 148 [2020-12-22 13:13:32,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:13:32,884 INFO L481 AbstractCegarLoop]: Abstraction has 22557 states and 30660 transitions. [2020-12-22 13:13:32,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 13:13:32,884 INFO L276 IsEmpty]: Start isEmpty. Operand 22557 states and 30660 transitions. [2020-12-22 13:13:32,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 13:13:32,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:13:32,893 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:13:33,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 13:13:33,094 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:13:33,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:13:33,095 INFO L82 PathProgramCache]: Analyzing trace with hash 52499894, now seen corresponding path program 2 times [2020-12-22 13:13:33,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:13:33,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372840450] [2020-12-22 13:13:33,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:13:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:13:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 13:13:33,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372840450] [2020-12-22 13:13:33,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578950863] [2020-12-22 13:13:33,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:13:37,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:13:37,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:13:37,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 1880 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 13:13:37,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:13:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 13:13:37,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:13:37,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 13:13:37,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518626687] [2020-12-22 13:13:37,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 13:13:37,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:13:37,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 13:13:37,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:13:37,416 INFO L87 Difference]: Start difference. First operand 22557 states and 30660 transitions. Second operand 8 states. [2020-12-22 13:13:40,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:13:40,936 INFO L93 Difference]: Finished difference Result 45257 states and 61513 transitions. [2020-12-22 13:13:40,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:13:40,937 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 150 [2020-12-22 13:13:40,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:13:41,130 INFO L225 Difference]: With dead ends: 45257 [2020-12-22 13:13:41,130 INFO L226 Difference]: Without dead ends: 22713 [2020-12-22 13:13:41,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:13:41,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22713 states. [2020-12-22 13:13:44,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22713 to 22661. [2020-12-22 13:13:44,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22661 states. [2020-12-22 13:13:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22661 states to 22661 states and 30764 transitions. [2020-12-22 13:13:44,597 INFO L78 Accepts]: Start accepts. Automaton has 22661 states and 30764 transitions. Word has length 150 [2020-12-22 13:13:44,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:13:44,597 INFO L481 AbstractCegarLoop]: Abstraction has 22661 states and 30764 transitions. [2020-12-22 13:13:44,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 13:13:44,597 INFO L276 IsEmpty]: Start isEmpty. Operand 22661 states and 30764 transitions. [2020-12-22 13:13:44,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-22 13:13:44,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:13:44,609 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:13:44,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:13:44,823 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:13:44,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:13:44,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1280539738, now seen corresponding path program 3 times [2020-12-22 13:13:44,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:13:44,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121280360] [2020-12-22 13:13:44,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:13:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:13:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 50 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 13:13:45,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121280360] [2020-12-22 13:13:45,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419184103] [2020-12-22 13:13:45,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:13:50,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 13:13:50,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:13:50,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 1367 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 13:13:51,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:13:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-22 13:13:51,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:13:51,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2020-12-22 13:13:51,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803007682] [2020-12-22 13:13:51,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:13:51,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:13:51,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:13:51,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:13:51,188 INFO L87 Difference]: Start difference. First operand 22661 states and 30764 transitions. Second operand 4 states. [2020-12-22 13:14:01,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:01,602 INFO L93 Difference]: Finished difference Result 54737 states and 74089 transitions. [2020-12-22 13:14:01,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:14:01,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2020-12-22 13:14:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:01,664 INFO L225 Difference]: With dead ends: 54737 [2020-12-22 13:14:01,664 INFO L226 Difference]: Without dead ends: 32089 [2020-12-22 13:14:01,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-22 13:14:01,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32089 states. [2020-12-22 13:14:05,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32089 to 22772. [2020-12-22 13:14:05,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22772 states. [2020-12-22 13:14:05,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22772 states to 22772 states and 30875 transitions. [2020-12-22 13:14:05,162 INFO L78 Accepts]: Start accepts. Automaton has 22772 states and 30875 transitions. Word has length 152 [2020-12-22 13:14:05,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:05,162 INFO L481 AbstractCegarLoop]: Abstraction has 22772 states and 30875 transitions. [2020-12-22 13:14:05,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:14:05,162 INFO L276 IsEmpty]: Start isEmpty. Operand 22772 states and 30875 transitions. [2020-12-22 13:14:05,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 13:14:05,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:05,176 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:14:05,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 13:14:05,392 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:05,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:05,393 INFO L82 PathProgramCache]: Analyzing trace with hash -593152379, now seen corresponding path program 1 times [2020-12-22 13:14:05,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:05,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521031973] [2020-12-22 13:14:05,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 50 proven. 25 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-22 13:14:05,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521031973] [2020-12-22 13:14:05,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836744686] [2020-12-22 13:14:05,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:06,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 1922 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:14:06,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-22 13:14:06,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:14:06,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2020-12-22 13:14:06,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053519427] [2020-12-22 13:14:06,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 13:14:06,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:06,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 13:14:06,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 13:14:06,708 INFO L87 Difference]: Start difference. First operand 22772 states and 30875 transitions. Second operand 11 states. [2020-12-22 13:14:18,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:18,273 INFO L93 Difference]: Finished difference Result 69177 states and 93314 transitions. [2020-12-22 13:14:18,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 13:14:18,274 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 153 [2020-12-22 13:14:18,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:18,461 INFO L225 Difference]: With dead ends: 69177 [2020-12-22 13:14:18,461 INFO L226 Difference]: Without dead ends: 46418 [2020-12-22 13:14:18,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-12-22 13:14:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46418 states. [2020-12-22 13:14:22,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46418 to 23761. [2020-12-22 13:14:22,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23761 states. [2020-12-22 13:14:22,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23761 states to 23761 states and 32251 transitions. [2020-12-22 13:14:22,505 INFO L78 Accepts]: Start accepts. Automaton has 23761 states and 32251 transitions. Word has length 153 [2020-12-22 13:14:22,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:22,505 INFO L481 AbstractCegarLoop]: Abstraction has 23761 states and 32251 transitions. [2020-12-22 13:14:22,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 13:14:22,505 INFO L276 IsEmpty]: Start isEmpty. Operand 23761 states and 32251 transitions. [2020-12-22 13:14:22,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 13:14:22,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:22,518 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:14:22,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:22,734 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:22,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:22,735 INFO L82 PathProgramCache]: Analyzing trace with hash 922898464, now seen corresponding path program 1 times [2020-12-22 13:14:22,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:22,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171083716] [2020-12-22 13:14:22,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 50 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-22 13:14:23,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171083716] [2020-12-22 13:14:23,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953074533] [2020-12-22 13:14:23,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:23,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 1938 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 13:14:24,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 50 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-22 13:14:24,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:14:24,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 13:14:24,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650829246] [2020-12-22 13:14:24,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:14:24,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:24,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:14:24,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:14:24,163 INFO L87 Difference]: Start difference. First operand 23761 states and 32251 transitions. Second operand 10 states. [2020-12-22 13:14:28,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:28,560 INFO L93 Difference]: Finished difference Result 47665 states and 64695 transitions. [2020-12-22 13:14:28,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 13:14:28,561 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 156 [2020-12-22 13:14:28,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:28,604 INFO L225 Difference]: With dead ends: 47665 [2020-12-22 13:14:28,604 INFO L226 Difference]: Without dead ends: 23917 [2020-12-22 13:14:28,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:14:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23917 states.